Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 27 for “"pretension"”.
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A pretension of place: The industrialization of corn belt agriculture, 1940-1965
1 PDF file (vi, 193 pages)
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Effects of pretension in reconstructions of the anterior cruciate ligament: clinical, biomechanical and computer model analyses
Contains fulltext : 146607.pdf (Publisher’s version ) (Open Access)
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Evaluation of Graft Pretension Effects in Anterior Cruciate Ligament Reconstruction: A Series of In Vitro and In Vivo Experiments
… dissertation was to study the effects of graft pretension in anterior cruciate ligament (ACL) reconstruction through a series of experiments. First, an in vitro study of 5 human knees was conducted to determine if intact joint kinematics could be restored when using the ideal graft - the …
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Effects of Head Size on the Performance of Twist-Off Bolts
… by measuring and comparing the achieved relaxed pretension force in the bolt after tightening. It was found that twist-off bolts with head diameters less than an ASTM F436 washer had no trouble attaining their required minimum pretension force. Bolt head diameter and hole size were found to have …
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Testing and prediction of failure of AHSS sheets at Die Radius and Sidewall using novel fracture apparatus
… various combinations of die radius, magnitude of pretension, and die/strip friction. Based on the experimental results, a deformation and failure map was generated, showing ranges of safe forming. Depending on the interplay of different parameters, fracture occurs either on the sidewall or on the …
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A New Rock Bolt Design Criterion and Knowlwdge-based Expert System for Stratified Roof
… optimizing bolt length, bolt density, and bolt pretension during installation. The impact of the number of strata layers within bolting range and pretension applied to bolts upon the stability of an opening was investigated using FLAC model. Four statistical models for predicting optimum bolt …
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Evaluation of Steel H-Piles with Localized Corrosion and Rehabilitation Using Friction-Type Bolted Steel Plates
… of the steel plates, the magnitude of bolt pretension and slip resistance. The findings indicated that increases of the length of the repair system, magnitude of bolt pretension and slip resistance can enhance the capacity of pile with local failure within the corroded region. These three …
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Thermomechanics of helical strands and helical-fiber-reinforced rods
… helical strand, with internal friction and pretension. The effects of the pretension level, bending amplitude, and the friction coefficient on the effective bending stiffness are elucidated. Second, in the no-slip regime, the existing Euler-Bernoulli framework for helical strands is …
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An Investigation of Anchor Nut Loosening and Review of Tightening Procedures for Anchor Rods in Highway Ancillary Structures
… first snug-tightened using a wrench before fully pretensioning them as per the current specifications. The snug-tight condition is vaguely defined at present and needs revisions to avoid any under-tightening or over-tightening. Galvanization and overtapping of the anchor nuts also pose a potential …
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James Gillray's Design for a Naval Pillar: Naval Heroism and Patriotic Public Display in late Eighteenth-Century Britain
… attitude towards the establishment and cultural pretension. It is argued that Gillray’s oeuvre demonstrates his dialogical engagement with, and perceptive awareness and exploitation of, the relationships between, official and unofficial discourses. This thesis explains specific Gillray works in …
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Investigating the ideal deltoid kinematics and tension in reverse shoulder arthroplasty (RSA).
… and muscle passive force measurement (deltoid pretension measurement). To investigate the effect of geometrical changes on kinematics of shoulder after RSA, a musculoskeletal model of the shoulder is developed and simulated. Geometrical parameters of the musculoskeletal model are extracted from …
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An Anatomically Representative Atlas-Based Finite Element Model of the Human Brain for Studying Brian Injury Biomechanics: Development, Validation and Comparison to Existing Models
… to achieve ideal biomechanics. Additionally, pretension and thickness of the falx were varied in a lateral impact configuration. The ABM was subjected to the boundary conditions from three high-rate experimental cadaver tests with different parameter combinations for each test. Brain …
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Finite Element Analysis of the Seismic Behavior of Guyed Masts
… determine the sensitivity of the response to guy pretension, which is a measure of the potential slackness in the guys during response. Additionally, the studies examined the effects of guy stiffness, mast properties, and directionality of input motion. Deflections, bending moments, guy tensions, …
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Double Angle Framing Connections Subjected to Shear and Tension
… complex phenomena of contact problems and the pretension forces in the bolts were simulated. A simplified angle model and an equivalent spring model were developed from the 3D results.
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A Refined Methodology for Calibrating Premium Connection Make-ups
… make-up. A 3D inspired axisymmetric<br />pretension loading scheme is developed which enables the 3D-wedge seal conditions to be<br />replicated in a computationally efficient axisymmetric form for connection performance<br />evaluation. Seal metrics are developed and converged to evaluate …
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Innovative Floating Wind Turbine with Synthetic Mooring System and Feasibility Analysis of a Solar-Wind-Battery Hybrid System
… on mooring system performance, examining pretension, static and dynamic tensions, and safety margins. The major conclusions of this study are discussed, emphasizing the key findings. Acomprehensive feasibility analysis and preliminary economic assessment of a solar-windbattery hybrid …
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Modal Analysis of a Discrete Tire Model and Tire Dynamic Response Rolling Over Short Wavelength Road Profiles
… to examine the influence of tire parameters and pretension forces on natural frequencies.
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Challenges in the design of tension moored floating wind turbines
… As tension moored platforms rely on the tendon pretension for stability, operations such as installation and maintenance towing without tendons are statically unstable. Additional float for tow stability are designed and analysed in this work. These floats are designed to become wave energy …
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The Bridges of Madison County and Iowa: Production, Reception, and Place
… hardcover novel of its era. Bridges' pretension to literariness touched a nerve with New York cultural gatekeeping literary reviewers, who conflated its perceived sub-literary qualities with its Iowa origins, middlebrow readership, and even cultural disease. Readers, however, …
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Wrinkling of Membrane and Thin Film under Torsion
… of wrinkles also increases same as the effect of pretension in the membrane case.</p>
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